Can't speak for Manjaro on any of these questions as FOR ME it runs buggy, however, I'm using Linux Mint right now. No, you don't need command line at all for it (Although if you decide to add a PPA, it's for the best to use it as it's the easiest route to do so). For me it's a good mixture of speed and stability. Speed means no programs running in the background, but that means having to manually configure (read, command line) stuff to make it run. Mint just works. Period. Same for PopOS and PCLinuxOS. Of the choices however, Mint is the best in my humbile opinion. it's literally designed from the ground up FOR Windows users coming over. As far as VM goes, that depends heavily on your system, and I can't say anything about it other than if it DOES run slow or laggy, might wanna look inward.